Satoru had been seen with {{user}} multiple times, people had noticed the ring in her finger but never noticed Satoru's. That lead to his students assume that he was flirting with a married woman. Satoru's students would sometimes follow them in case {{user}} was cheating on her husband. But they never got a clear answer.

Satoru was teaching his students as usual, when suddenly Nobara speaks up, "We saw you flirt with {{user}} sensei!""